Nut-lock



UNITED SrATns PATENT owns.

WILLIAM WOOLCOOK, OF SHAMOKIN, PENNSYLVANIA.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 544,605, dated August13, 1895. Application filed August 27,1894. Serial No. 521,471- (Nomodel.)

To all whom it may concern.-

Be it known that 1, WILLIAM WooLoooK, residing at Shamokin,in the countyof Northumberland and State of Pennsylvania, have invented a new anduseful Improved Nut- Lock, of which the following is a specification.

My invention is an improvement in the detached from each other. Fig. 3is a central longitudinal section of the nut-lock. Fig. 4 is atransverse section on the line 4 4 of Fig. 8. Fig. 5 is an end view ofthe nut-lock. Fig. 6 is a perspective view of the pawl and spring. Fig.7 is a side View of the ratchet.

The threaded end of the bolt A has a reduced and squared extension at.The boltnut B has an exteriorly-threaded boss b on one side. (See Figs.2 and 3.)

The cap-nut O is recessed and threaded interiorly at its inner end, andthus adapted to screw on the boss I) of the bolt-nut B, as shown in Fig.3. the cap-nut O has a central circular opening to receive the circularor cylindrical portion cl of the ratchet D. The latter has a toothedportion (1, Fig. 7, contiguous to such cylindrical portion d, and isprovided with a square axial aperture adapted to receive the extensionat the bolt A. v

The pawl E is pivoted in a radial slot of the cap-nut 0, being providedwith lateral gudgeons or pivots e, that project into opposite grooves c,Figs. 1 and 4, formed in the side walls of the slot in the cap-nut C andextending tangentially from the axial opening to a point near theperiphery.

The circular divided spring F is adapted to lie in the annular space orcavity, Fig. at, between the ratchet D and the surrounding The other orouter end of 7 wall of the cap-nut C. One end of the spring F actsagainst the outer arm of the pawlE, thus tending to hold the latterengaged with the ratchet.

In practical use, the nut B and cap-nut C may be first screwed togetherand then screwed on the bolt A, or the nut B may be first screwed on andthen the cap-nut O, with the ratchet D, pawl E, and spring F arrangedtherein, as shown in Figs. 2 and 4, may be applied and screwed on theboss I) or the nut. When thus applied, it is apparent the squaredextension at of the bolt A enters the corresponding opening in theratchet D, and that the latter is thereafter prevented from rotating,and that the engagement of the pawl E with the ratchet D then preventsbackward' rotation of the cap-nut 0, so that the not B is also locked orheld immovable against on the bolt, if required, since in such case.

the pawl E will obviously run free over the inclined teeth of theratchet D.

In order to remove the cap-nut O and its attached or contained parts, itis only neces sary to depress the projecting outer end of the pawl E,whereby its nose or toothed portion will be disengaged from the ratchetD. It is apparent a wrench may be'applied to the nut B and cap-n ut C atthe same time, so as to unscrew both simultaneously.

The grooves c in the cap-nut 0 permit the pawl E to be easily insertedor removed. The pawl may be inserted in place after and instead ofbefore the cap-nut has been applied to the nut B and bolt A.

It is obvious the extension a of bolt A may have any polygonal shapethat will prevent rotation of the ratchet therein, yet permit itsremoval.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. The combination with a threaded bolt having a reduced polygonalextension, and a nut having a threaded boss, of a cap nutadaptcd toscrew on said boss, a ratchet applied to the bolt extension, and a pawland spring arranged substantially as shown and described.

2. The combination with a threaded bolt having a reduced polygonalextension, and a nut having a threaded boss, of a cap nut which screwson said boss and means for looking it to the bolt, substantially asshown and described.

3. The combination with a threaded bolt, and nut, of a cap nut having ascrew connection with the latter, of a pawl and ratchet mechanism forlocking the cap nut against backward rotation, substantially as shownand described.

4:. The combination with the bolt, nut and cap nut having an axialopening, of aratchet having a reduced smooth cylindrical portion adaptedto fit in said opening, whileits lower

